Improvement in machinery for molding heel-stiffenings for boots and shoes



l 2Sheets-Sheet2. SIMON DS GL E. Fl. EM ERY. Machinery `fur MoldingHeel-Stienin'gs `fur Boots and Shoes.

Patented Feb.10,18174.

No.l47,288.

F/c. E

NATHAN J. SIMONDS AND E. RUSSELL EMERY, OF VOBURN, MASS.

IMPROVEMENT IN MACHINERY FOR MOLDING HEEL-STIFFENINGS FOR BOOTS ANDSHOES.

Specification formng pait of Letters Patent No. 147,23@ dated February10, 1874,' application filed June 30, 1873.

CASE B.

To all ywhom it may concern:

Be it known that we, NATHAN J. Snuonns and F. R. EMERY, of NVOburn, inthe county ot' Middlesex and State of Massachusetts, have invented newand useful Improvements in Ma chinery for Moldin g Heel-Stiffenin gs forBoots and Shoes, of which the following is a specification:

rlhis invention relates to machines employed to mold or compressheel-stitfenings into the exact configuration which they are to occupywhen embodied in the boot or shoe 5 and the invention consists in asolid form, corresponding to the interior of a molded stiffening, anelastic intermediate mold, and a divided mold, the cavity in whichcorresponds to the exterior of a molded st-iening; also in `reliefdevices which compensate for varying thicknesses of stiffenings, saiddevices consisting of elastic packing placed Vbeneath and behind theform, of yielding supports to which the halves of the mold are hinged,and also in adjustable cams which act upon the divided mold as itdescends and force it against the intermediate mold and thestift'enine'.

Figure l is a front elevation, showing the divided mold raised. Fig. 2is a vertical section taken on line Y Z, Fig. 1. Fig. 3 is a verticalsection taken on line TV X, Fig. 2, and showing the molds closed uponthe stift'ening. Fig. l is a horizontal section taken on line U V, Fig.l, and also showing the molds closed upon the stiffenin.

In the drawings, a represents the driving pulley, which is actuatedeither' by a belt, clutch, or other device. b is the drvii'lgsshaft,upon which is secured pulley a and pinion c, which latter meshes intogear-wheel d, secured upon shaft c, the front end of which is formedwith a crank, as shown in Fig. 2, the wrist-pin engaging the slidingblockj', which slides laterally in a `slot in cross-head g, which latterslides vertically between guides h 71, and, by the devices shown anddescribed, has imparted to it a reciprocating movement equal to thestroke ofthe crank upon shaft c. i are the halves of the divided mold,which are, respectively, socketed in blocks jj, these latter bein gconstructed with a dovetaiIed groove fitting to eral adjustment when theinternal pressure is greater than the resistance of springs 7c k. ll

are springs secured to the cross-head and conneoted with the halves ofthe mold by short rods m m, and serve to open the mold when it rises. nis the for1n, which is seated upon bed o, beneath which is placed theelastic packing or cushion p, which allows a downward yielding movementto prevent undue pressure upon the form. r is the internal elastic mold,and s is the stift'enin g placed between the mold and the form. rlhelower ends of mold r are pivoted to links t, which latter 'are pivotedto rod u., and this is stepped in the front end of the centrally-pivotedlever e, as shown in Fig. 2, a spring, y, connected with the `rear endof this lever tending to draw the mold downward. w is a treadle, therear end of which is pivoted in stud ar, and is connected with the leverby the links e, so that the downward pressure of the foot upon thefrontend of the treadle serves to force up rod u, and thereby raise mold rfrom off the stift'enin 0'. a a are cams, pivoted, at b', in bed o. c care adjustable faces of the cams, which, by actuating screws d d', areraised or lowered for the purpose of prodncin g a greater or less degreeof inward pressure or motion upon the halves -of mold t', which, as itdescends, acts upon the lower horns of these cams, thereby forcinginward. the upper. ends, which, in turn, force the divided mold againstthe mold i'. Small spiral springs, shown in Fig. 3, are inserted in bedo beneath the cams, inside their pivots, to throw them apart when themold rises. c is a guard or keeper, against which the front angcs ofmold e' bear as it descends, thereby preventing the mold from bein gforced outward. The elastic' packing g', placed behind the form, allowsa yield ing movement when the thickness ofthe stift'- ening demands it.I

The practical workin g of this machine, briefly stated, is as follows:The mold t' being raised to the position shown in Fig. l, the operator,by actuating' the treadle, raises the interior mold 1^ from the forni,when the stiii'ening is bent to the curvature of the forni and insertedbetween it and mold r, when the treadle is released, and the action ofspring y forces mold r down upon the stif'ening'. The machine is thenset in motion, the Inold i descends, coming` in contact with eains a',and closing in upon the interior mold r, as shown in Fig. 3, therebyforcing the stiffening into the exact shape of the mold and form, theflange of the stiffening, which is inserted between the soles of theshoe, being pressed between the front of the forin and the verticalfront flanges of mold 1'., the pressure between which is assured byguard e and elastic packing g, as before described.

I claim as iny invention--s l. The combination of the divided mold 'iand forni u, substantially as described and shown.

2. In combination with meldt and form n, the interior mold i,substantially as described and shown.

3. The sliding blocks j and springs k, or their equivalents,substantially as and for the purposes specified.

4. In. combination with mold i z, the cams a a', substantially asdescribed and shown.

5. The guard or keeper e', in combination with mold i and forln fn,substantially as deA scribed and shown.

NATHAN J. SIMONDS. E. RUSSELL EMERY. Witnesses z EBEN HUfrcHrNsoN, T. W.PORTER.

